ISDN Server Does Not Answer Incoming Calls
ID: Q121879
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The information in this article applies to:
-
Microsoft Windows NT Workstation versions 3.5, 4.0
-
Microsoft Windows NT Server versions 3.5, 4.0
SYMPTOMS
Windows NT 3.5 Remote Access Services (RAS) doesn't answer incoming ISDN
calls.
CAUSE
This problem occurs when the phone number (in the Network portion of
Control Panel for the ISDN adapter) contains non-numeral characters (for
example, a dash "-").
The ISDN driver does not parse non-numeral characters out of the phone
number string correctly. This causes incoming calls to be ignored by the
adapter.
WORKAROUND
Don't use non-numeral characters in the phone number.
NOTE: When you try to change or remove the phone number, the ISDN setup
program does not delete the phone number correctly. If this happens, use
one of the following procedures:
Remove and Reinstall the ISDN Adapter Driver
- Remove the ISDN adapter driver from the Network portion of Control
Panel.
- Shutdown and restart your computer.
- In Control Panel, add the ISDN driver back without entering a phone
number.
- Reconfigure RAS and restart your computer again.
Edit the Registry
- Start Registry Editor.
- In the HKEY_LOCAL_MACHINE subtree go to the following sub-key:
SYSTEM\CurrentControlSet\Services\Pcimac#
where # is the network adapter number of the PCIMAC that has been
installed.
- Under this key there is a Paramters key with the following value(s):
Line#.LTerm#.Address
Delete all of the Line#.LTerm#.Address values.
NOTE: Line# is the line number and LTerm# is the logical terminal
number. The PCIMAC - ISA adapter which supports only one ISDN line will
only have Line0. The PCIMAC/4 adapter with 4 ISDN lines will have lines
numbered from 0 to 3.
- Restart your computer.
STATUS
Microsoft and Digiboard International are aware of the problems and are
working on a revised driver. We will post more information here in the
Microsoft Knowledge Base as it becomes available.
Additional query words:
prodnt
Keywords : kbnetwork ntras NTSrvWkst
Version : 3.5 4.0
Platform : winnt
Issue type :